Step for aerobic exercise



FIG. 1 is a perspective view of a step for aerobic exercise showing mynew design;

FIG. 2 is a perspective view thereof, showing the step in an invertedposition;

FIG. 3 is a top plan view of FIG. 1;

FIG. 4 is a bottom plan view of FIG. 1;

FIG. 5 is a left side elevational view of FIG. 1; and,

FIG. 6 is a side elevational view, taken at 90 degrees from FIG. 5.

The ornamental design for a step for aerobic exercise, as shown.